Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas das escolas são designadas privadas/Presbiterianas?
 ###Tabelas: CREATE TABLE current_members (current_members_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Location VARCHAR, Founded INT, Affiliation VARCHAR, Enrollment INT, Team Nickname VARCHAR, Primary conference VARCHAR) CREATE TABLE medal_standings (medal_standings_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Nation VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE final_wildcards (final_wildcards_id AUTO_INCREMENT PRIMARY KEY, Draw INT, Artist VARCHAR, Song VARCHAR, Televote VARCHAR, Place INT) CREATE TABLE most_dismissals_in_test_career_wicketkeeper (most_dismissals_in_test_career_wicketkeeper_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Dismissals INT, Player VARCHAR, Caught INT, Stumped INT, Matches INT, Innings INT) CREATE TABLE single_game (single_game_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Player VARCHAR, County VARCHAR, Tally VARCHAR, Total INT, Opposition VARCHAR)  
SELECT COUNT Location FROM current_members WHERE Affiliation = Private/Presbyterian